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Sound deadening, sound proofing - which have you done and what are your results?

Foxclub83

New member
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Texas
Also for the tunnel I used 3/4 plywood wrapped it and glued down the 4 way stretch carpet. The hole piece is held down with bolts into nutserts and the top of the bolt is capped off to give it a nice finish.
Nice work. Great ideas. What about drainage? Any issues or did you make cuts at the drainage slots?
 

thoner7

Active member
321
201
43
Location
NE TN
4 way stretch carpet? Never knew that existed.

Where’d you get it/what brand? Is it self adhesive or did you use a spray?
 

Pstyckiewicz

Active member
237
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43
Location
Massachusetts
So the carpet is called underfelt. It’s also called 4 way stretch. It is not to bad to work with. They use it a lot in camper van stuff. It is glued down. I used 3m spray glue. Spray the surface then spray the carpet and stick them together.

 

thoner7

Active member
321
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Location
NE TN
So drainage I just covered it up. It’s water tight from the rain. I used a lot of seam sealer. I have the PlanB top and doors.
if that carpeting durable? Or would it rip if there’s a have bag thrown on it for example


my top and doors are good now too from rain, but I still get some water in from around the snorkel and windshield washer bottle areas in the front driver and passenger footwell. And a little around the rear glass at the rubber weather strip
 

Hummer Guy

Well-known member
843
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93
Location
United States Louisiana
Did the sound deadening make a big difference? I installed what I thought was sound deadening from the advertisement, but it really was just insulation for hit, its way too light to be a sound deadener. I don't want to rip it out so I may just do the sound deadening in the firewall.

I use some actual sound deadener in the m35a2 and it made a difference but was worried it won't in the humvee since the engine sits so close to the inside of the vehicle
 

thoner7

Active member
321
201
43
Location
NE TN
Did the sound deadening make a big difference? I installed what I thought was sound deadening from the advertisement, but it really was just insulation for hit, its way too light to be a sound deadener. I don't want to rip it out so I may just do the sound deadening in the firewall.

I use some actual sound deadener in the m35a2 and it made a difference but was worried it won't in the humvee since the engine sits so close to the inside of the vehicle
I’m curious, what is your “actual sound deadener”
 

Pstyckiewicz

Active member
237
125
43
Location
Massachusetts
My truck is still loud haha but definitely a lot less. Keeps the kids quiet in the back or at least I can’t hear them.
Without taking the body off the frame there is only so much you can do.
 

thoner7

Active member
321
201
43
Location
NE TN
For those that care I downloaded a free app on my phone - dB meter - to record my decibels before and after the sound proofing doing. I have an 1165a1 hard top roof and aftermarket fiberglass doors.

highway speed -60-70mph- 90 dB
Country roads, take me home -35-45 mph - 85 dB
Idle - 76 dB

for reference my f150 is 68 dB going 80 on the highway.

I have only completed the passenger side floor so I can’t really say how much it’s worked.
 

Thunderbirds

Well-known member
270
388
63
Location
Northern Black Hills South Dakota
That’s probably the best way to figure out effectiveness. I think I’ll do the same thing. Possibly from head height of passenger and driver side as that is where I keep my ears usually, as well as finding the loudest areas such as tunnel, foot well areas, and others…

Will post soon as I record them. Great idea.
 

Mogman

Moderator
Staff member
Moderator
Steel Soldiers Supporter
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113
Location
Papalote, TX
For those that care I downloaded a free app on my phone - dB meter - to record my decibels before and after the sound proofing doing. I have an 1165a1 hard top roof and aftermarket fiberglass doors.

highway speed -60-70mph- 90 dB
Country roads, take me home -35-45 mph - 85 dB
Idle - 76 dB

for reference my f150 is 68 dB going 80 on the highway.

I have only completed the passenger side floor so I can’t really say how much it’s worked.
There is no such thing as a free app. :eek:
 
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